Adultery
noun, な adjective, の adjective
ふりん
浮気 (うわき) Affair, Infidelity
不貞 (ふてい) Unfaithful, Infidelity
不倫 (ふりん) Adultery
赴任 (ふにん) Move For A Different Job, Move For A Job
Adultery is when you're fooling ふりん around with someone else's wife.